Anthropic Claude API
by Anthropic
PaidDeveloper API for building AI applications with Claude models. Offers Claude Opus, Sonnet, and Haiku models with features like tool use, vision, prompt caching, and batch processing. Used by thousands of companies.
Overview
The Anthropic Claude API provides developer access to Claude's family of AI models for building applications, automations, and AI-powered products. It offers Claude Opus (most capable), Sonnet (balanced), and Haiku (fastest) with features like tool use, vision, prompt caching, and batch processing. The API is used by thousands of companies for chatbots, content generation, data analysis, and coding assistance.
Key Features
Multiple Models — Claude Opus 4.6, Sonnet 4.6, and Haiku 4.5 for different performance/cost needs
Tool Use — Enable Claude to call external functions and APIs
Vision — Analyze images, charts, and documents alongside text
Prompt Caching — Cache repeated context for 90% cost savings
Batch API — Process large volumes at 50% discount
Extended Thinking — Allow Claude to reason through complex problems step-by-step
Messages API — Simple, powerful API for building conversational applications